public void GetParamID(Action<string> callback)
{
Debug.Assert(callback != null);
DetailsContext context = new DetailsContext();
context.RegisterDetailsParam(UserIDs, CurrentDate, EventIDs, EventIDRanges, PcID,
c =>
{
Debug.WriteLine("{0:HH:mm:ss.fff}>GetParamID", DateTime.Now);
if (ProcessError(c))
{
callback(null);
return;
}
callback(c.Value);
}, null);
}